dibenzyl [4,17-dimethyl-3,6,10,13,16,19,23,26-octaoxo-11,24-di(propan-2-yl)-9,22-dioxa-28,29-dithia-2,5,12,15,18,25-hexaazabicyclo[12.12.4]triacontane-7,20-diyl]biscarbamate